JP6364313B2 - Pressure plate - Google Patents

Description

  The present invention relates to a pressure receiving plate installed on a slope to prevent the slope from being collapsed or landslide.

  As an effective means for preventing the collapse of a slope or the occurrence of landslide, a method of installing a pressure receiving plate on the slope and pressing the slope with the pressure receiving plate is widely adopted.

  As a pressure receiving plate, a plate having a rectangular contact surface is known in order to increase the pressure receiving area. As such a pressure receiving plate, the thing as described in Unexamined-Japanese-Patent No. 2003-184094 (patent document 1) is mentioned.

  As another type of pressure receiving plate, a plate having a cross-shaped contact surface is known in order to reduce volume or weight. As such a pressure receiving plate, the thing as described in Unexamined-Japanese-Patent No. 2003-313877 (patent document 2) is mentioned.

JP 2003-184094 A JP 2003-313877 A

  The pressure receiving plate described in Japanese Patent Application Laid-Open No. 2003-184094 (Patent Document 1) secures a sufficient pressure receiving area by laminating rectangular plate members, and bends, compresses and compresses by concentrated load on the central portion. It has good resistance to shearing and has excellent rigidity as a pressure receiving plate. On the other hand, in order to ensure the excellent rigidity, the total volume and the total weight must be increased, and improvement in construction is required.

  The pressure receiving plate described in Japanese Patent Laid-Open No. 2003-313877 (Patent Document 2) has a good construction surface due to reduction in volume and weight, but the pressure receiving area is inevitably reduced.

As described above, the conventional pressure receiving plate does not satisfy both of the desired rigidity as the pressure receiving plate and the reduction in volume and weight.
In addition, there is a problem in durability of the pressure receiving plate, particularly in climate, geothermal heat, gas, etc., for example, in a hot spring area.

  An object of the present invention is to provide a pressure receiving plate capable of ensuring desired rigidity and reducing the weight, and preventing deterioration with time due to the environment.

(1)
The pressure receiving plate according to one aspect is disposed on one surface of the bottom plate member constituting the bottom surface and the bottom plate member, and disposed on the inside of the outer frame so as to reinforce the outer frame member and the outer frame member constituting the outer frame. A reinforcing member and an inorganic-filled composite material disposed in a space constituted by the outer frame member and the reinforcing member are included. The inorganic-filled composite material includes a linear reinforcing member for reinforcing the inside of a wire diameter of 2.0 mm or more and 10.0 mm or less.

In this case, since the inorganic filled composite material is provided in the space constituted by the outer frame member and the reinforcing member, and the linear reinforcing member is provided inside the inorganic filled composite material, the linear reinforcing member is exposed to the outside. Can be prevented, and corrosion of the linear reinforcing member can be prevented.
In addition, since the inorganic-filled composite material itself is also provided in the space, deterioration due to acid rain or the like can be prevented.
As a result, the pressure receiving plate according to the present invention can reduce desired rigidity and weight, and can prevent deterioration over time due to the environment.

(2)
The pressure receiving plate according to a second aspect of the present invention is the pressure receiving plate according to one aspect, wherein the linear reinforcing member may be disposed closer to the bottom plate member than a neutral point of the layer thickness of the inorganic-filled composite material.

In this case, since the linear reinforcing member is disposed closer to the bottom plate member than the neutral point of the layer thickness of the inorganic-filled composite material, cracks in the inorganic-filled composite material can be prevented.
That is, the tensile stress resistance can be increased by disposing the inorganic filler composite material to which the tensile stress is applied on the bottom plate member side from the neutral point of the layer thickness.

(3)
In the pressure receiving plate according to the third aspect of the present invention, in the pressure receiving plate according to one aspect or the second aspect of the invention, the outer frame member may be made of a glass fiber reinforced resin constituent material.

In this case, since the outer frame member is made of a glass fiber reinforced resin constituent material, it is possible to improve corrosion resistance and deterioration resistance.
In addition, since not all of the pressure receiving plate but part of the pressure receiving plate is made of glass fiber reinforced resin, the cost of the entire pressure receiving plate can be reduced.

(4)
The pressure receiving plate according to a fourth aspect of the present invention is the pressure receiving plate according to one aspect, the second or third aspect, wherein the reinforcing member may be made of a glass fiber reinforced resin constituent material.

In this case, since the reinforcing member is made of a glass fiber reinforced resin constituent material, it is possible to improve corrosion resistance and deterioration resistance.
Moreover, since a part rather than the whole pressure receiving plate is made of a glass fiber reinforced resin constituent material, the cost of the entire pressure receiving plate can be reduced.

(5)
In the pressure receiving plate according to the fifth aspect of the present invention, in one aspect, the pressure receiving plate according to the second to fourth aspects of the invention, the inorganic-filled composite material may be composed mainly of mortar or concrete.

In this case, since the inorganic filled composite material is made of mortar or concrete, the stress resistance can be kept high.
Moreover, since the inorganic filling composite material which has mortar or concrete as a main component contains a linear reinforcement member, it can raise a tensile stress further.

(6)
A pressure receiving plate according to a sixth aspect of the present invention is the pressure receiving plate according to the fifth aspect of the present invention, wherein the linear reinforcing member may be formed in a lattice shape.

  In this case, since the linear reinforcing member is formed in a lattice shape, the tensile stress can be further increased.

(7)
The pressure receiving plate according to a seventh aspect of the present invention is the pressure receiving plate according to the sixth aspect of the present invention, wherein the linear reinforcing member has an interval between adjacent linear reinforcing members of 20% or less of the length of the outer frame member. You may arrange | position so that it may become.

  In this case, since the distance between the linear reinforcing members is set to be 20% or less of the length of the outer frame member, the tensile stress can be sufficiently increased.

(8)
A pressure receiving plate according to an eighth aspect of the present invention is the pressure receiving plate according to the seventh aspect of the present invention from the one aspect, a top plate member for closing the space provided with the inorganic filling composite material, and a pressure receiving head provided on the surface side of the top plate member And an anchor insertion hole formed in the pressure receiving head portion, the top plate member, the bottom plate member, and the reinforcing member, and at least a part of the pressure receiving head portion is made of a glass fiber reinforced resin component, and is in a glass fiber direction. May be the axial direction of the anchor insertion hole.

  In this case, in a part of the pressure receiving head portion, the glass fiber direction is the axial direction of the anchor insertion hole, so that pressure receiving stress can be reliably received.

(9)
A pressure receiving plate according to a ninth aspect of the invention is the pressure receiving plate according to the eighth aspect of the invention, wherein the pressure receiving head portion may be formed in a substantially cross shape in plan view with respect to the top plate member.

  In this case, since the pressure receiving head portion is formed in a substantially cross shape in plan view with respect to the top plate member, the weight can be reduced and the top plate member can be efficiently supported.

(10)
The pressure receiving plate according to a tenth aspect of the invention is the pressure receiving plate according to the ninth aspect of the invention from one aspect, wherein the linear reinforcing member may have nodes, ribs or barbs in part.

  In this case, since the linear reinforcing member has nodes, ribs, or barbs in part, the adhesion between the inorganic-filled composite material and the linear reinforcing member can be improved.

It is a typical external appearance perspective view which shows an example of the pressure receiving plate concerning this Embodiment. It is a schematic structure diagram of a pressure receiving plate. It is a schematic structure diagram of a pressure receiving plate. It is a schematic structure diagram of a pressure receiving plate. It is a typical structure figure for explaining the structure of a reinforced concrete member. It is typical sectional drawing which shows the state which has arrange | positioned the pressure receiving plate in the slope. It is a figure which shows the test result of the Example and comparative example of a reinforced concrete member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same elements are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[Embodiment]
FIG. 1 is a schematic external perspective view showing an example of a pressure receiving plate 100 according to the present embodiment. 2 to 4 are schematic structural diagrams of the pressure receiving plate 100. FIG.

As shown in FIG. 1, the pressure receiving plate 100 mainly includes a first pressure receiving member 200, a second pressure receiving member 300, and a reinforced concrete member 400.
The first pressure receiving member 200 includes a bottom plate 210, a frame body 220, a top plate 230, and a reinforcing material 240.
The second pressure receiving member 300 includes a first laminated plate 310, a second laminated plate 320, a pressure receiving head 330, and a bearing plate 340 (see FIG. 6).
Further, an anchor insertion hole 250 is formed through the pressure receiving plate 100 at the center of the pressure receiving plate 100 in plan view.

First, as shown in FIG. 2, a frame body 220 made of a rectangular frame is placed on a flat plate 210 of the first pressure receiving member 200.
And the reinforcing material 240 which consists of two rod members is inserted in the inside of the frame 220 which consists of a rectangular frame. As a result, four spaces are formed by the frame body 220 and the reinforcing member 240.
The reinforced concrete member 400 is placed in the formed space.

  Subsequently, as shown in FIG. 3, the second pressure receiving member 300 having a cross shape in a plan view is disposed on the top plate 230 having a flat plate shape. Details of the second pressure receiving member 300 will be described later.

  Finally, as shown in FIG. 4, the top plate 230 and the second pressure receiving member 300 are placed on the bottom plate 210, the frame body 220, the reinforcing material 240, and the reinforced concrete member 400.

  As a result, the pressure receiving plate 100 shown in FIG. 1 is formed. In the present embodiment, the second pressure receiving member 300 is arranged on the top plate 230. However, the present invention is not limited to this. After the reinforced concrete member 400 is arranged, the top plate 230 is arranged, and then The second pressure receiving member 300 may be disposed.

(Material and size of first pressure receiving member)
In the present embodiment, the bottom plate 210 of the first pressure receiving member 200 is made of a long glass fiber reinforced plastic foam (hereinafter referred to simply as FFU). It is preferable that the fiber direction is arranged in parallel to the plane having the maximum area of a flat plate shape.
In addition, the size of the bottom plate 210 is preferably a maximum area of 0.8 square meters to 20 square meters. In the present embodiment, the bottom plate 210 is 4 square meters and has a thickness of 3 centimeters.

Next, the frame body 220 of the first pressure receiving member 200 is made of FFU. The fiber direction is preferably parallel to the direction in which the frame body 220 is arranged with respect to the bottom plate 210 shown in FIG.
The frame 220 has a rectangular maximum length of 1.8 meters and a cross section of 6 centimeters × 6 centimeters.

Next, the top plate 230 is made of FFU, similarly to the bottom plate 210, and the fiber direction is preferably arranged in parallel to the flat surface having the maximum area.
The top plate 230 preferably has a maximum area of 0.4 square meters to 20 square meters. In the present embodiment, the top plate 230 is 3.2 square meters and has a thickness of 3 centimeters.

Subsequently, the reinforcing member 240 is made of FFU, and the fiber direction is preferably along the direction of the cross in plan view. That is, the reinforcing member 240 is formed by combining two members, and preferably along the longitudinal direction.
Furthermore, the size of the reinforcing member 240 is preferably 168 centimeters in length in the longitudinal direction, and the cross section is preferably 20 centimeters × 6 centimeters.

(Material and size of second pressure receiving member)
In the present embodiment, the first laminated plate 310 of the second pressure receiving member 300 is made of FFU and has a width of 30 cm, a thickness of 6 cm, and a length of 150 cm.
The fiber direction is preferably arranged in parallel with the longitudinal direction.

Next, the second laminated plate 320 of the second pressure receiving member 300 is made of FFU and has a width of 30 centimeters, a thickness of 6 centimeters, and a length of 110 centimeters.
The fiber direction is preferably arranged in parallel with the longitudinal direction.

Subsequently, the pressure receiving head 330 is made of FFU and has a width of 45 cm, a thickness of 6 cm, and a length of 45 cm. The fiber direction is preferably arranged in the thickness direction.
As shown in the figure, the width may be 30 centimeters and the length may be 30 centimeters.

(Material and size of reinforced concrete member 400)
Next, FIG. 5 is a schematic structural diagram for explaining the structure of the reinforced concrete member 400.

As shown in FIG. 5, a reinforced concrete member 400 having a rectangular shape is formed by arranging reinforced members 425 in a lattice shape and filling mortar or concrete around the periphery. The reinforcing bar member 425 is formed of a deformed reinforcing bar having a rib or the like.
The reinforced concrete member 400 has a thickness (T) of 6 cm, a width of 74 cm, and a length of 74 cm.

Further, the reinforcing member 425 is provided at a position of a thickness T1 (T1> T / 2) from the surface of the layer thickness T of the entire reinforced concrete member 400 or a position of a thickness T2 (T2> T / 2) from the surface.
That is, in the case of the layer thickness T of the entire reinforced concrete member 400, the reinforcing bar member 425 is disposed at a position (thickness) greater than half the layer thickness T (T / 2) from the surface side. Therefore, the reinforcing bar member 425 is arranged on the bottom surface side of the center (T / 2) of the layer thickness T of the reinforced concrete member 400.

The wire diameter R1 of the reinforcing bar member 425 is preferably 2.0 mm or greater and 10.0 mm or less. In the present embodiment, the wire diameter R1 is 3.2 mm.
Furthermore, the reinforcing bar member 425 is provided at an interval L2. The interval L2 is arranged at 20% or less of the length L1 (see FIG. 4) of one side of the frame body 220.

(Arrangement of pressure plate)
FIG. 6 is a schematic cross-sectional view showing a state in which the pressure receiving plate 100 is arranged on the slope. FIG. 6 shows a cross section of the pressure receiving plate 100 along the line AA in FIG.

As shown in FIG. 6, the pressure receiving plate 100 is installed on the slope 900 of the slope. A hole reaching the bedrock (not shown) inside the slope surface 900 is formed, and the anchor 600 is arranged so as to be perpendicular to the slope surface 900. One end of the anchor 600 is fixed by a grout material such as cement filled in the rock or the hole through the hole.
The other end of the anchor 600 is projected from the slope 900.

Next, the pressure receiving plate 100 is installed through the anchor insertion hole 250 of the pressure receiving plate 100 from the other end side of the anchor 600 arranged on the slope surface 900.
Then, the pressure bearing plate 340 is disposed on the pressure receiving head 330 of the pressure receiving plate 100, and the anchor bolt B is attached and fixed to the anchor 600.
As a result, the pressure receiving plate 100 is pressed against the slope 900 and fixed.

[Example]
Tests such as bending strength were performed on the reinforced concrete member 400 in the present embodiment. The test conditions were carried out according to JIS standard JIS A 1106.

<Example 1>
In Example 1, the reinforcing bar member 425 of the reinforced concrete member 400 was disposed at a position 10 mm from the lower surface on the bottom plate 210 side. The reinforcing bar member 425 has a diameter (φ) of 3.2 mm.

<Example 2>
In Example 2, the reinforcing member 425 of the reinforced concrete member 400 was disposed at the center of the layer thickness. The reinforcing bar member 425 has a diameter (φ) of 3.2 mm.

<Comparative Example 1>
In Comparative Example 1, the reinforced concrete member 400 was not used, but a member having the same outer shape as that of Examples 1 and 2 made of only concrete was used.

  FIG. 7 is a diagram showing test results of examples of the reinforced concrete member 400 and comparative examples.

 As shown in FIG. 7, the maximum bending load in Comparative Example 1 was 5544 N, and the bending strength was 4.6 MPa.

Moreover, the bending maximum load in Example 1 was 111975N, and the bending strength was 10.0 MPa.
Further, the maximum bending load in Example 2 was 5855 N, and the bending strength was 5.0 MPa.

As shown in FIG. 7, the fracture condition after the maximum load was applied. In Example 1, the upper surface caused bending compression fracture, and the lower surface had one or two cracks, but no fracture. .
Similarly, in Example 2, a crack occurred in the central portion, but there was no breakage.
On the other hand, in Comparative Example 1, breakage occurred from the central portion.

  From Examples and Comparative Examples, it was found that Example 2 can prevent breakage compared to Comparative Example 1. Furthermore, it was found that Example 1 maintains about twice the strength of Example 2. That is, it was found that Example 1 was twice as strong and high in fracture resistance as Comparative Example 1.

As described above, the pressure receiving plate 100 according to the present embodiment includes the frame body 220 and the reinforcing material 240.
Since the reinforced concrete member 400 is provided in the space constituted by the reinforced concrete member 400 and the reinforced member 425 is provided inside the reinforced concrete member 400, it is possible to prevent the reinforced member 425 from being exposed to the outside and to prevent corrosion of the reinforced member 425. can do.
Moreover, since the reinforced member 425 is arrange | positioned from the neutral point of the layer thickness T of the reinforced concrete member 400 to the baseplate 210 side, the crack of the reinforced concrete member 400 can be prevented.

  Further, since the reinforced concrete member 400 itself is also provided in the space, it is possible to prevent deterioration due to acid rain or the like.

Furthermore, since the frame body 220 and the reinforcing material 240 are made of FFU which is a glass fiber reinforced resin constituent material, corrosion resistance and deterioration resistance can be improved.
In addition, since not all of the pressure receiving plate 100 but part of the pressure receiving plate 100 is made of FFU which is a glass fiber reinforced resin constituent material, the cost of the entire pressure receiving plate 100 can be reduced.

  Further, the reinforced concrete member 400 is mainly composed of concrete, the reinforcing member 425 is formed in a lattice shape, and the lattice-like interval is arranged at 20% or less of the length of one side of the frame body 220. It can be kept high and the tensile stress can be further increased.

In this case, the pressure receiving head 330 can reliably receive pressure receiving stress from the slope surface 900 because the glass fiber direction is parallel to the axial direction of the anchor insertion hole 250.
In addition, since the first laminated plate 310 and the second laminated plate 320 are formed in a substantially cross shape in plan view with respect to the top plate 230, the weight can be reduced and the top plate 230 can be supported efficiently. .

[Correspondence Relationship Between Each Part in Embodiment and Other Examples and Each Component in Claim]
In the present invention, the pressure receiving plate 100 corresponds to the “pressure receiving plate”, the bottom plate 200 corresponds to the “bottom plate member”, the frame body 220 corresponds to the “outer frame member”, and the reinforcing member 240 corresponds to the “reinforcing member”. Reinforced concrete member 400 corresponds to “inorganic filled composite material”, reinforcing member 425 corresponds to “linear reinforcing member”, layer thickness T corresponds to “layer thickness”, and top plate 230 corresponds to “top plate” The second pressure receiving member 300 corresponds to the “pressure receiving head portion”, and the anchor insertion hole 250 corresponds to the “anchor insertion hole”.

  Preferred embodiments of the present invention are as described above, but the present invention is not limited to them, and various other embodiments are possible without departing from the spirit and scope of the present invention. Furthermore, the operations and effects described in this embodiment are merely examples, and do not limit the present invention.

100 pressure receiving plate 210 bottom plate 220 frame 230 top plate 240 reinforcing material 250 anchor insertion hole 300 second pressure receiving member 400 reinforced concrete member 425 rebar member T layer thickness

Claims (10)

A bottom plate member constituting the bottom surface;
An outer frame member disposed on one surface of the bottom plate member and constituting an outer frame;
A reinforcing member disposed inside the outer frame to reinforce the outer frame member;
An inorganic filling composite material disposed in a space constituted by the outer frame member and the reinforcing member,
The said inorganic filling composite material is a pressure receiving plate containing the linear reinforcement member for strengthening inside the wire diameter of 2.0 mm or more and 10.0 mm or less.   The pressure receiving plate according to claim 1, wherein the linear reinforcing member is disposed closer to the bottom plate member than a neutral point of the layer thickness of the inorganic filled composite material.   The pressure receiving plate according to claim 1, wherein the outer frame member is made of a glass fiber reinforced resin constituent material.   The pressure receiving plate according to any one of claims 1 to 3, wherein the reinforcing member is made of a glass fiber reinforced resin constituent material.   The pressure-receiving plate according to any one of claims 1 to 4, wherein the inorganic-filled composite material is composed of mortar or concrete as a main component.   The pressure receiving plate according to claim 1, wherein the linear reinforcing member is formed in a lattice shape.   The pressure receiving plate according to any one of claims 1 to 6, wherein the linear reinforcing member is disposed such that an interval between adjacent linear reinforcing members is 20% or less of a length of the outer frame member. A top plate member for closing the space provided with the inorganic filled composite material;
A pressure receiving head portion provided on the surface side of the top plate member;
The pressure receiving head portion, the top plate member, the bottom plate member, and an anchor insertion hole formed in the reinforcing member, and
The pressure receiving plate according to any one of claims 1 to 7, wherein at least a part of the pressure receiving head portion is made of a glass fiber reinforced resin constituent material, and a glass fiber direction is an axial direction of the anchor insertion hole.   The pressure receiving plate according to claim 8, wherein the pressure receiving head portion is formed in a substantially cross shape in plan view with respect to the top plate member. The pressure receiving plate according to any one of claims 1 to 9, wherein the linear reinforcing member has a node, a rib, or a barb in part.

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